Click on the discussion tab. Click on Ch. 4 Discussion. There will be other responses already posted. Scroll down to the text box. Do not change the subject line. Enter your reply and click Post.
Choose one response to reply to. Scroll down to enter your text. Do not change the subject line. Begin your reply with: "In response to..." Click Post to submit response.
Choose one response to reply to. Scroll down to enter your text. Do not change the subject line. Begin your reply with: "In response to..." Click Post to submit response.